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Chapter 19. Fundamentals of IP Security

IP Security (IPsec) has been around for a long time, and that is quite a good trick for any technology in today’s fast-moving world. The secret of IPsec is that it is not locked in to one specific protocol or even one set of protocols. As technology advances, so can the protocols that are being used by IPsec. The goal of IPsec is quite simple: to provide confidentiality, data integrity, and authentication of the virtual private network (VPN) peer and provide antireplay support. It implements all of these to Layer 3 packets individually, protecting each one as they are sent from one ...

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